Bloody rippa!
Disassembled the steering box
again yesterday, and put it back together with fresh gaskets. This time I coated the surfaces of gasket & metal with lashings of sealant. This morning, I anxiously checked for leaks before leaving for work, and found NOTHING untoward.
Now, every gasket I replace will have this treatment. I have never used sealant before, but won't do any future work without it.
